I like the idea of a pvc bottom tank with glass sides. I'd even be into a pvc back. Imagine being able to just drill a hole when you need to, without worrying about it cracking or anything? That would be great. If they have a good bonding techique, I'd give it a shot. With all the routing they do, I would love to see something where a pvc base/bottom is groved to accept the vertical glass panels, but extends beyond the glass to form a round over, or decorative bead. It would be perfect for small tanks where you aren't going to hide the bottom with your stand edge.